HARP-NEF Front End Assembly

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Nicholas Johnston
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1 Science Fibers HARP-NEF Front End Assembly Calib Fibers HARPN Front End Assembly ( w/ Partial Cover Plates ) HARPN Front End Assembly 1

2 HARP-NEF Front End Assembly Roger Eng December 6,

HARP-NEF Front End Assembly 7 8 1. Atmospheric Dispersion Compensator (ADC) Assy 2. Tip Tilt Mirror & Stage Assy 3. Guide Camera & Re-Imaging Optics Assy 3 5 4 6 4.

3 HARP-NEF Front End Assembly Atmospheric Dispersion Compensator (ADC) Assy 2. Tip Tilt Mirror & Stage Assy 3. Guide Camera & Re-Imaging Optics Assy Calibration Light Projection Optics Assy 5. Calibration Fibers Assy 2 6. Calibration Fold Mirror Translation Assy 7. Neutral Density Filter 8. Focal Plane Fibers Assy HARPN Front End w/ Partial Cover Plates 1 3

Atmospheric Dispersion Compensator (ADC) Assy FWD Prism Pair - 2 Prism Pairs in Assembly - Each Prism Pair Glass Material: Glass 1 : OHARA PBL6Y Glass 2 : OHARA S-FSL5Y - Inner Surfaces of Each Prism

4 Atmospheric Dispersion Compensator (ADC) Assy FWD Prism Pair - 2 Prism Pairs in Assembly - Each Prism Pair Glass Material: Glass 1 : OHARA PBL6Y Glass 2 : OHARA S-FSL5Y - Inner Surfaces of Each Prism Pair Parallel Mounted & Perpendicular to Optical Axis - Prism Pairs Counter Rotate from Each Other - Rotating Motion - Ring & Pinion Gears and Driven by NEMA-17 Stepper Motors Drive Motor FWD Prism ADC Assy ( Telescope Side ) AFT Prism Pair - Rotary Encoder w/ Home Switch per Prism Assy for Positioning Control ADC Assy ( Front End Side ) Drive Motor AFT Prism 4

Encoder & Home Switch Respectively Angular Positioning Accuracy: Requirement: +/- 0.

5 Mechanism ADC Assy Requirement: Controlled Counter Rotating Motion between Both Prism Pairs Accomplished: Counter Rotating Motion - Ring & Pinion Gear Driven by Stepper Motor w/ Rotary Encoder & Home Switch Respectively Angular Positioning Accuracy: Requirement: +/ Degree Capability: +/ Degree AFT Prism Pinion & Ring Gear Drive FWD Prism Pinion & Ring Gear Drive 5

Mounted on Tip-Tilt Stage Tip-Tilt Mirror Mirror and Stage Assy Mounted on Rigid Structure of Front End Support Tip-Tilt

6 Tip-Tilt Mirror & Stage Assy Tip-Tilt Mirror to Re-Direct Telescope Light to Focal Plane Fibers & to Compensate Guiding Errors Mirror is Elliptical Shape, 190 mm x 140 mm Mirror & Stage Mount Plate Mirror Bonded on Interface Plate which is Mounted on Tip-Tilt Stage Tip-Tilt Mirror Mirror and Stage Assy Mounted on Rigid Structure of Front End Support Tip-Tilt Stage Tip-Tilt Stage & Controller: By Physik Instrumente ( PI ) Stage P558 TCD Controller E710 Both Are Off the Shelf Items 6

Guide Camera & Re-Imaging Optics Assy For Objects Acquisition, Centering & Guiding of the Telescope Camera & Optics Mount Guide Camera Design Heritage Projects: TRES & MAGELLAN A Self-Contained Unit

7 Guide Camera & Re-Imaging Optics Assy For Objects Acquisition, Centering & Guiding of the Telescope Camera & Optics Mount Guide Camera Design Heritage Projects: TRES & MAGELLAN A Self-Contained Unit with: Vacuum Window Vacuum Port CCD Thermal Electric Cooler Re-Imaging Optics Group Canon - EF 100 mm, f/2.8 Macro USM Off the Self Commercially Available Unit Remotely Adjustable Focus Capability Guide Camera Assy Re-Imaging Optics 7

Requirement: Focus Adjustment for Guide Camera Re-Imaging Optics Group Mechanism - Guide Camera & Re-Imaging Optics Assy Re-Imaging Optics Camera & Optics Support Structure Guide Camera Assy

8 Requirement: Focus Adjustment for Guide Camera Re-Imaging Optics Group Mechanism - Guide Camera & Re-Imaging Optics Assy Re-Imaging Optics Camera & Optics Support Structure Guide Camera Assy Accomplished: Focus Motion Timing Belt & Sprocket Driven by Stepper Motor w/ Rotary Encoder & Home Switch Angular Positioning Accuracy: Requirement: +/ Degree Step Motor w/ Encoder Capability: +/ Degree Focus Belt & Pulley Drive 8

Calibration Light Projection Optics Assy Heritage of HARPS at La Silla Design Located Between Calibration Fibers and Calibration Fold Mirror Projection Optics Beam Housing Contains 2 Separate Optical

9 Calibration Light Projection Optics Assy Heritage of HARPS at La Silla Design Located Between Calibration Fibers and Calibration Fold Mirror Projection Optics Beam Housing Contains 2 Separate Optical Paths of 2 Calibration 16 mm Apart 2 Sets of Identical Optics Entrance & Exit Sets Entrance Lens Adjustable by Linear & Rotational Motions Pupil Mask Installed at End of Entrance Lens Mount Tube Exit Lens Sets Fix Mounted Both Calibration Light Beams Contained in the Projection Optics Housing Adjustable Bi-Directionally by Eccentric Cam Motions Exit Optics Entrance Optics Optics Holders Provide Rotational & Linear Adjustment 9

Calibration Fibers Assy Heritage of at La Silla Design & A Direct Duplication Consists of 2 Fibers @ 16 mm Apart Each Calibration Fiber Adjustable Tri-Directionally with Micrometer Head Fine Tuning

10 Calibration Fibers Assy Heritage of at La Silla Design & A Direct Duplication Consists of 2 16 mm Apart Each Calibration Fiber Adjustable Tri-Directionally with Micrometer Head Fine Tuning Calibration Light Source - Located Remotely Away from Telescope & Instruments Hollow Cathode Lamps & Halogen Lamp Provide Visible Light Source Through Calibration Fibers to the Focal Plane Fibers Fiber Illuminator to Provide External Light Source HARPS - South Calibration Fibers Assy Calibration Fiber Location 10

Calibration Fold Mirror Translation Assy Step Motor w/ Encoder Fold

Fold Mirror All 4 Configurations Achieved by Linear Motion Translation

Linear Motion Stage Spur Gears & Coupling NEMA-17 Stepper Motor Rotary

11 Calibration Fold Mirror Translation Assy Step Motor w/ Encoder Fold Mirror Steers Calibration Light Onto the Focal Plane Fibers Calibration Fold Mirror All 4 Configurations Achieved by Linear Motion Translation to Selected Position of Mirror THK Stage Linear Motion Components: THK Linear Motion Stage Spur Gears & Coupling NEMA-17 Stepper Motor Rotary Encoder & Limit Switches Calibration Fold Mirror Translation At True Location 11

12 Mechanism Calibration Fold Mirror Translation Requirement: Four Configurations 1. All Sky Light 2. Sky Light & Calibration Light 3. Both Calibration Light 4. Sky Light & Other Calibration Light Accomplished: All Four Configurations Met Translation Stage to Move Calibration Fold Mirror to the Appropriate Position Translation Motion Driven by Step Motor w/ Rotary Encoder & Limit Switches for Homing & Safety Linear Positioning Accuracy: Requirement: +/ mm Capability: +/ mm ( Based on 10 mm Lead Screw Pitch of Drive Motor ) Config. 1 Config. 2 Config. 3 Config. 4 12

Neutral Density Filter Located Between Calibration Fibers & Projection Optics Variable Neutral Density Filter Mounted Perpendicular to the Calibration Light Beams Allows For Adjustments of Flux

13 Neutral Density Filter Located Between Calibration Fibers & Projection Optics Variable Neutral Density Filter Mounted Perpendicular to the Calibration Light Beams Allows For Adjustments of Flux Exposure of a Calibration Source Directly Coupled and Driven by NEMA-17 Stepper Motor through Reduction Gear Head, w/ Home Reference & Rotary Encoder for Accuracy Step Motor w/ Gear Head w/ Encoder Variable Neutral Density Filter: Reynard Corporation Substrate: BK mm Diameter x 2 mm Thick 13

Mechanism Neutral Density Filter Requirement: Adjustment of the Flux of a Calibration Source Injected into the Focal Plane Fibers Neutral Density Filter Accomplished: A Variable Neutral Density

14 Mechanism Neutral Density Filter Requirement: Adjustment of the Flux of a Calibration Source Injected into the Focal Plane Fibers Neutral Density Filter Accomplished: A Variable Neutral Density Filter is Mounted In Line of Calibration Source, Driven by Stepper Motor w/ Rotary Encoder & Home Switch Angular Positioning Accuracy: Requirement: +/ Degree Capability: +/ Degree ( w/ Gear Reduction ) Direct Drive Step Motor w/ Gear Head & Encoder 14

Telescope to the Guide Camera Through Its Front End Lens Group Focal Plane Fiber Holder At True Location Fiber

15 Focal Plane Fibers Assy Heritage of HARPS at La Silla Design 2 Fibers Separated by 16 mm Fibers Mounted Parallel in Housing Through 2 Pierced Holes Angled Reflective Mirror on Front Face of Housing Angled Mirror Re-Directs Light from Telescope to the Guide Camera Through Its Front End Lens Group Focal Plane Fiber Holder At True Location Fiber Protector for Protection of the Focal Plane Fibers When Instrument Not In Use Angled Reflective Surface Focal Plane Fiber Holder 15

Motor w/ Rotary Encoder & Home Switch Angular Positioning Accuracy: Requirement: +/- 2.

16 Mechanism Focal Plane Fiber Protector Requirement: Provide Protection to Science Fibers when not in Use Accomplished: A Protective Shield Rotated into Position to Shield the Fiber Head, Driven by a Stepper Motor w/ Rotary Encoder & Home Switch Angular Positioning Accuracy: Requirement: +/- 2.0 Capability: +/- 0.9 Fiber Protector Material: Delrin, Black Focal Plane Fibers Exposed Focal Plane Fibers Protected 16

Handling - Lift Rings & Slings Provided for Hoist Lift & Handling - Facility Hoist and Man Lift Used for Integration

17 Front End Assembly Handling Hoist Point Mechanical Handles for Manual Handling ADC Installation - Handled Manually - Mechanical Handles Provided - Standard Hardware & Tools Used Front End Assembly - Mechanical Handles Provided for Build-Up Handling - Lift Rings & Slings Provided for Hoist Lift & Handling - Facility Hoist and Man Lift Used for Integration Installation - Standard Hardware and Tools Used ADC Assembly Hoist Ring Manufacturer: Jergens Capacity: 1900 kg ea Front End Assembly ( w/o ADC ) 17

HARPS-NEF ELECTRICAL SYSTEMS. Tom Gauron

HARPS-NEF ELECTRICAL SYSTEMS. Tom Gauron Tom Gauron 1 Electrical Systems Functional Blocks System Physical Layout Subsystem Detail Front End Physical Layout Auxiliary Room Electronics Racks Power Summary 2 Figure 1 System Function Diagram HARPS-NEF